Police work the scene on M Street, SE in Washington, where a gunman was reported at the Washington Navy Yard in Washington, on Monday, Sept. 16, 2013. The U.S. Navy says one person is injured after a shooting at a Navy building in Washington. less

Police work the scene on M Street, SE in Washington, where a gunman was reported at the Washington Navy Yard in Washington, on Monday, Sept. 16, 2013. The U.S. Navy says one person is injured after a shooting ... more

Photo: Jacquelyn Martin

Police work the scene on M Street, SE in Washington, where a gunman... Photo-5199536.70353 - NewsTimes

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Armed U.S. Marshals leave the scene where a gunman was reported at the Washington Navy Yard in Washington, on Monday, Sept. 16, 2013. At least one gunman launched an attack inside the Washington Navy Yard, spraying gunfire on office workers in the cafeteria and in the hallways at the heavily secured military installation in the heart of the nation's capital, authorities said. less

Armed U.S. Marshals leave the scene where a gunman was reported at the Washington Navy Yard in Washington, on Monday, Sept. 16, 2013. At least one gunman launched an attack inside the Washington Navy Yard, ... more

Photo: Jacquelyn Martin, STF

Armed U.S. Marshals leave the scene where a gunman was reported at... Photo-5199538.70353 - NewsTimes

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An officer who said he was with the Department of Defense, right, and members of the Navy, stand guard inside the gate of the closed Washington Navy Yard in Washington, on Tuesday, Sept. 17, 2013, the day after a gunman launched an attack inside the Washington Navy Yard. less

An officer who said he was with the Department of Defense, right, and members of the Navy, stand guard inside the gate of the closed Washington Navy Yard in Washington, on Tuesday, Sept. 17, 2013, the day after ... more

Photo: Jacquelyn Martin, STF

An officer who said he was with the Department of Defense, right,... Photo-5199540.70353 - NewsTimes

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Emergency vehicles and law enforcement personnel respond to the shooting at an entrance to the Washington Navy Yard Monday September 16, 2013 in Washington, DC.

Emergency vehicles and law enforcement personnel respond to the shooting at an entrance to the Washington Navy Yard Monday September 16, 2013 in Washington, DC.

People hold their hands to their heads as they are escorted out of the building where a deadly shooting rampage occurred.

People hold their hands to their heads as they are escorted out of the building where a deadly shooting rampage occurred.

Photo: Jacquelyn Martin

People hold their hands to their heads as they are escorted out of... Photo-5199544.70353 - NewsTimes

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Police and first responder activity on M Street, SE near the Washington Navy Yard on September 16, 2013 in Washington, DC. A gunman opened fire at the US Navy Yard in Washington on Monday and wounded several people including two police officers, officials reported. Police and FBI agents descended on the area in force as helicopters buzzed overhead, amid reports the shooter was armed with an assault rifle and was on the loose in the complex. A Washington DC police officer and another law enforcement officer had been shot while the gunman had allegedly barricaded himself in a room in a headquarters building, the Washington Post and other media reported. At one point a police helicopter hovering over the complex lowered a man down by rope into the compound. Police blocked off intersections around the Navy Yard as military troops in uniform stood guard at street corners. less

Police and first responder activity on M Street, SE near the Washington Navy Yard on September 16, 2013 in Washington, DC. A gunman opened fire at the US Navy Yard in Washington on Monday and wounded several ... more

A U.S. Park Police helicopter removes a man in a basket from the Washington Navy Yard Monday, Sept. 16, 2013. Earlier in the day, the U.S. Navy said it was searching for an active shooter at the Naval Sea Systems Command headquarters, where about 3,000 people work. Thirteen people were killed. less

A U.S. Park Police helicopter removes a man in a basket from the Washington Navy Yard Monday, Sept. 16, 2013. Earlier in the day, the U.S. Navy said it was searching for an active shooter at the Naval Sea ... more

Photo: Jacquelyn Martin

A U.S. Park Police helicopter removes a man in a basket from the... Photo-5199549.70353 - NewsTimes

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K-9 units search streets and building around the Navy Yard after responding to the report of a shooting at the Navy Yard in Washington, DC, September 16, 2013. A gunman shot and killed at 12 people at the headquarters building at the US Navy Yard. less

K-9 units search streets and building around the Navy Yard after responding to the report of a shooting at the Navy Yard in Washington, DC, September 16, 2013. A gunman shot and killed at 12 people at the ... more

A man who would identify himself only as a Navy Yard employee walks past the wall encircling the Washington Navy Yard to leave a bouquet of flowers there in Washington, on Tuesday, Sept. 17, 2013.

A man who would identify himself only as a Navy Yard employee walks past the wall encircling the Washington Navy Yard to leave a bouquet of flowers there in Washington, on Tuesday, Sept. 17, 2013.

Photo: Jacquelyn Martin, STF

A man who would identify himself only as a Navy Yard employee walks... Photo-5199558.70353 - NewsTimes

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Staff of the Naval Sea Systems Command headquarters exchange a salute while being greeted by family and friends as they are bused from the Washington Navy Yard to Nationals Park, in Washington, Monday, Sept. 16, 2013. less

Staff of the Naval Sea Systems Command headquarters exchange a salute while being greeted by family and friends as they are bused from the Washington Navy Yard to Nationals Park, in Washington, Monday, Sept. ... more

A member of the Navy has her ID checked as only essential personnel are allowed in to a closed Washington Navy Yard in Washington, on Tuesday, Sept. 17, 2013.

A member of the Navy has her ID checked as only essential personnel are allowed in to a closed Washington Navy Yard in Washington, on Tuesday, Sept. 17, 2013.

Photo: Jacquelyn Martin, STF

A member of the Navy has her ID checked as only essential personnel... Photo-5199560.70353 - NewsTimes

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A police officer stands by a locked gate at the Washington Navy Yard, closed except to essential personnel, in Washington, on Tuesday, Sept. 17, 2013. The gate at right is open to allow ID checks of essential personnel. less

A police officer stands by a locked gate at the Washington Navy Yard, closed except to essential personnel, in Washington, on Tuesday, Sept. 17, 2013. The gate at right is open to allow ID checks of essential ... more

Photo: Jacquelyn Martin, STF

A police officer stands by a locked gate at the Washington Navy... Photo-5199561.70353 - NewsTimes

A man who would identify himself only as a Navy Yard employee walks to lay a bouquet of flowers by an anchor outside of the closed Washington Navy Yard.

A man who would identify himself only as a Navy Yard employee walks to lay a bouquet of flowers by an anchor outside of the closed Washington Navy Yard.

Photo: Jacquelyn Martin, STF

A man who would identify himself only as a Navy Yard employee walks... Photo-5199564.70353 - NewsTimes

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District of Columbia Police Chief Cathy Lanier, center, flanked by Rep. Eleanor Holmes Norton, D-D.C., left, and District of Columbia Mayor Vincent Gray, right, briefs reporters on the shooting at the Washington Navy Yard. less

District of Columbia Police Chief Cathy Lanier, center, flanked by Rep. Eleanor Holmes Norton, D-D.C., left, and District of Columbia Mayor Vincent Gray, right, briefs reporters on the shooting at the ... more

Defense Secretary Chuck Hagel, right, and Joint Chiefs Chairman Gen. Martin Dempsey, second from right, present a wreath at the Navy Memorial in Washington to remember the victims of Monday's deadly shooting at the Washington Navy Yard. less

Defense Secretary Chuck Hagel, right, and Joint Chiefs Chairman Gen. Martin Dempsey, second from right, present a wreath at the Navy Memorial in Washington to remember the victims of Monday's deadly shooting at ... more

Valerie Parlave, assistant director in charge of the FBI's Washington Field Office, left, next to Washington Metropolitan Police Chief, speaks at a news conference about the shootings at the Washington Navy Yard, at the FBI Washington Field Office, in Washington, on Tuesday, Sept. 17, 2013, the day after the shootings at the Navy Yard. less

Valerie Parlave, assistant director in charge of the FBI's Washington Field Office, left, next to Washington Metropolitan Police Chief, speaks at a news conference about the shootings at the Washington Navy ... more

Secretary of the Navy Ray Mabus speaks during a news conference at Washington Hospital Center, in Washington, Monday, Sept. 16, 2013, after he visited those injured at the shooting at Navy Yard building. With him at right is chief operating officer Dr. Janis M. Orlowski and Adm. Jonathan Greenert. less

Secretary of the Navy Ray Mabus speaks during a news conference at Washington Hospital Center, in Washington, Monday, Sept. 16, 2013, after he visited those injured at the shooting at Navy Yard building. With ... more

Secretary of the Navy Ray Mabus speaks with Dr. Janis M. Orlowski as they walk in the corridor at Washington Hospital Center, in Washington, on Monday, after visiting the people injured in the shooting at the Washington Navy Yard. less

Secretary of the Navy Ray Mabus speaks with Dr. Janis M. Orlowski as they walk in the corridor at Washington Hospital Center, in Washington, on Monday, after visiting the people injured in the shooting at the ... more

President Barack Obama walks out to speak in the South Court Auditorium on the White House complex, Monday, Sept. 16, 2013, in Washington, about the Washington Navy Yard shooting.

President Barack Obama walks out to speak in the South Court Auditorium on the White House complex, Monday, Sept. 16, 2013, in Washington, about the Washington Navy Yard shooting.

Photo: Pablo Martinez Monsivais, Associated Press

President Barack Obama walks out to speak in the South Court... Photo-5199572.70353 - NewsTimes

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This photo provided by the family of John Roger Johnson, shows the 73-year-old man from Derwood, Md., who was one of the 12 victims killed in the shooting rampage at the Washington Navy Yard on Monday, Sept. 16, 2013. less

This photo provided by the family of John Roger Johnson, shows the 73-year-old man from Derwood, Md., who was one of the 12 victims killed in the shooting rampage at the Washington Navy Yard on Monday, Sept. ... more

Photo: Courtesy Of The Johnson Family

This photo provided by the family of John Roger Johnson, shows the... Photo-5199573.70353 - NewsTimes

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This photo provided by the Rotary Club of Lexington Park, shows Frank Kohler, the 50-year-old man from Tall Timbers, Md., who was one of the 12 victims killed in the shooting rampage at the Washington Navy Yard on Monday, Sept. 16, 2013. less

This photo provided by the Rotary Club of Lexington Park, shows Frank Kohler, the 50-year-old man from Tall Timbers, Md., who was one of the 12 victims killed in the shooting rampage at the Washington Navy Yard ... more

Photo: Courtesy Of Rotary Club Of Lexington Park

This photo provided by the Rotary Club of Lexington Park, shows... Photo-5199574.70353 - NewsTimes

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This image released by the FBI shows a photo of Aaron Alexis, the gunman at the Washington Navy Yard shooting in Washington, Monday morning, Sept. 16, 2013, and who was killed after he fired on a police officer. less

This image released by the FBI shows a photo of Aaron Alexis, the gunman at the Washington Navy Yard shooting in Washington, Monday morning, Sept. 16, 2013, and who was killed after he fired on a police ... more

Photo: Uncredited, Associated Press

This image released by the FBI shows a photo of Aaron Alexis, the... Photo-5199575.70353 - NewsTimes

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Taboola Gallery Frame Item-85307.70353 - NewsTimes

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Debris sits in front of the last known address of Aaron Alexis Monday, Sept. 16, 2013, in Fort Worth, Texas.

Debris sits in front of the last known address of Aaron Alexis Monday, Sept. 16, 2013, in Fort Worth, Texas.

Photo: LM Otero, STF

Debris sits in front of the last known address of Aaron Alexis... Photo-5199576.70353 - NewsTimes

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The flag flies at half-staff at the front entrance of the Naval Air Station Joint Reserve Base in Fort Worth, Texas Tuesday, Sept. 17, 2013. Officials say Aaron Alexis, an information technology employee with a defense contractor who once served at this base, used a valid pass to get into the Washington Navy Yard building where he opened fire Monday, Sept. 16, 2013, killing 12 people. less

The flag flies at half-staff at the front entrance of the Naval Air Station Joint Reserve Base in Fort Worth, Texas Tuesday, Sept. 17, 2013. Officials say Aaron Alexis, an information technology employee with a ... more

Photo: LM Otero

The flag flies at half-staff at the front entrance of the Naval Air... Photo-5199577.70353 - NewsTimes

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Three women embrace near Nationals Park where family members waited to greet loved ones that were at the Washington Navy Yard, Monday Sept. 16, 2013, in Washington.

Three women embrace near Nationals Park where family members waited to greet loved ones that were at the Washington Navy Yard, Monday Sept. 16, 2013, in Washington.

Photo: Alex Brandon, STF

Three women embrace near Nationals Park where family members waited... Photo-5199578.70353 - NewsTimes

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Family and friends wait at a baseball stadium parking lot to be reunited with workers who survived the shooting rampage at the Washington Navy Yard.

Family and friends wait at a baseball stadium parking lot to be reunited with workers who survived the shooting rampage at the Washington Navy Yard.

Photo: Jacquelyn Martin, STF

Family and friends wait at a baseball stadium parking lot to be... Photo-5199579.70353 - NewsTimes

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Taboola Gallery Frame Item-85307.70353 - NewsTimes

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A man walks with a woman after they were reunited at a family gather point for Navy Yard shootings set up at parking lot B of Nationals Park on September 16, 2013 in Washington, DC.

A man walks with a woman after they were reunited at a family gather point for Navy Yard shootings set up at parking lot B of Nationals Park on September 16, 2013 in Washington, DC.

Photo: MANDEL NGAN, Staff

A man walks with a woman after they were reunited at a family... Photo-5199580.70353 - NewsTimes

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A small group holds a candle light vigil on Freedom Plaza to remember the victims of the shooting at the Washington Navy Yard, Monday.

A small group holds a candle light vigil on Freedom Plaza to remember the victims of the shooting at the Washington Navy Yard, Monday.

Photo: J. Scott Applewhite, STF

A small group holds a candle light vigil on Freedom Plaza to... Photo-5199581.70353 - NewsTimes

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Brittany Carter of Bowie, MD. is overcome with emotion during a vigil at Freedom Plaza on September 16, 2013 in Washington, DC. The vigil, during which organizers called for stricter gun laws, was in remembrance of the 12 victims killed in a shooting at the Washington Navy Yard earlier in the day. less

Brittany Carter of Bowie, MD. is overcome with emotion during a vigil at Freedom Plaza on September 16, 2013 in Washington, DC. The vigil, during which organizers called for stricter gun laws, was in ... more

Eddie Weingart of Project End Gun Violence speaks to members of the media during a candlelight vigil at Freedom Plaza on September 16, 2013 in Washington, DC. The vigil, during which Weingart called for stricter gun laws, was in remembrance of the 12 victims killed in a shooting at the Washington Navy Yard earlier in the day. less

Eddie Weingart of Project End Gun Violence speaks to members of the media during a candlelight vigil at Freedom Plaza on September 16, 2013 in Washington, DC. The vigil, during which Weingart called for ... more

Photo: Greg Kahn, Getty Images

Eddie Weingart of Project End Gun Violence speaks to members of the... Photo-5199585.70353 - NewsTimes

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The American flags surrounding the Washington Monument fly at half-staff as ordered by President Barack Obama following the deadly shooting Monday at the Washington Navy Yard.

The American flags surrounding the Washington Monument fly at half-staff as ordered by President Barack Obama following the deadly shooting Monday at the Washington Navy Yard.